Tromell is Seymour Guado's advisor, and arranges the meeting between Seymour and the party. Later, he brings Yuna to visit Seymour at Macalania Temple. When the party fights and defeats Seymour, Tromell calls them traitors and orders their capture.

With the Guado in disgrace, Tromell has fled to Macalania Woods where he lives in hiding with the rest of the Guado. In the end, however, Tromell brings his people back to Guadosalam and becomes their de-facto leader.